lib/distribution/exponential/ruby.rb in distribution-0.7.3 vs lib/distribution/exponential/ruby.rb in distribution-0.8.0

@@ -2,22 +2,27 @@
   module Exponential
     module Ruby_
       class << self
         def rng(l, opts = {})
           rng = opts[:random] || Random
-          lambda {p_value(rng.rand,l)}
+          -> { p_value(rng.rand, l) }
         end
-        def pdf(x,l)
-          return 0 if x<0
-          l*Math.exp(-l*x)
+
+        def pdf(x, l)
+          return 0 if x < 0
+          l * Math.exp(-l * x)
         end
-        def cdf(x,l)
-          return 0 if x<0
-          1-Math.exp(-l*x)
+
+        def cdf(x, l)
+          return 0 if x < 0
+          1 - Math.exp(-l * x)
         end
-        def p_value(pr,l)
-          (-Math.log(1-pr)).quo(l)
+
+        def quantile(pr, l)
+          (-Math.log(1 - pr)).quo(l)
         end
+
+        alias_method :p_value, :quantile
       end
     end
   end
 end